Brake



Feb. 21, 1933. R. s SANFORD 15898315 BRAKE Filed Dec. 27. 1926 2 Sheets-Sheet l Mmf RW@ N EY Feb. 2l, E933. R s, SANFORD BRAKE Filed Deo. 27 1926 ROY 5. SANFORD ATTORNEY lspliuned hub of' s d f 80 and yhe tion 52 seated in a notch formed in a bracket or support 56 or 56 in the modification of Figure 5) in which the cam-shaft is journalled. Each of the supports 56 is formed with a flange 58 engaging directly or through a friction washer 60 with the hacking plate 2t and cooperating with a nut 62 friction ally to resist angular movement of the bracket 56. The projection 52 is somewhat smeller than the notch 54e? so that the cam 40 hasn predetermined angular movement without disturbing` the bracket or support 56. whereas if the breite has worn the projection 52, after its predetermined angular move;

" ment, will engage the tace of the notch 54 and shift the braclret 56 slightly about the anis of the cam-shaft when the breite is applied. Vil/hen the brake is again released, the projection 52 will have a predetermined releasin movement, after which it will engage the en of the notch 54- and prevent further movement of the cam rlhus the cam will hold the brake shoes in such position as to give them predetermined clearance with respect to the drum 22.

As `shown in Figure, the cam-shaft 66 of cach of the rear bralresy which is journalled at oneend in the adjustabiesupport or bearing1 56, is journailed its opposite end in a bracket 68 mounted on the aule 18. A sleeve 70 mounted on the shaft 66 is slotted at one end at 72 to embrace pins 64 on opposite sides of the shaft 66, thus keying the sleeve 70 to the cam-shaft in a manne: which permits the sleeve to move axially of the shaft while at the same time angular movement of the sleeve will cause angular movement of the shaft. At its inner end the sieeve 70 is formed with inclined splines ffslidably received in the an operating' arm or lever 'Z6 connected the corresponding linlr 50. Movement of the F6 axially of the shaft 66 may be prevented by projection 78 received in a forli formed on or carried by the bracket 68. A- coil spring 82 is conned between the arm Z6 and a flange 84 on the sleeve 70, and since 'the .7 6 is held by the aforlr 80 the spring 82 constantly urges the sleeve 70 toward the lett in igure 2.

When the brake is released, if it has worn suticiently to cause an adjustment of the support 56., the shaft 6 be stopped by the projection 52 before the lini: 50 lies reached the end of its releasingl movement. Thereupon the spring 82 ill be "ree to shift the sleeve 'i0 to the inclined splines 7twi 6 with respect ng it back once i released position, thus compensating; for the automatic adjustment of the cam l Figure mechanism of 88 are rorme wn s modiflcation of the ure 2, in

ich. the inclined releasing rectiy on the inclined splines 88. A spring 9tcontined between the nut 62 and the arm 92 serves as before to shift the arm with respect to the splines to compensate for adjusted released positions of the cam 10 to provide predetermined clearance of the brake shoes with respect to the drum as they become worn.

The mechanism for operating one o t the front wheel brakes is-shown in Figure 5, the

'control through which the brake is operated 1n a manner permitting the wheel to be swivelled in steering being generally of the Perrot type described in Patent No. 1,604,394, iggranted Bendix Brake Company, on October 26s 1926, on an application of A. Y. Dodge.

1n this illustrated type of control the brake is operated by an arm 96 on a control shaft 98 connected by a universal joint 100 to a relativeiy short cam shaft 102 journalled in the bearing` 56 and on which the cam 4:0 is keyed or otherwise secured. 'lhe chassis end ot' the shalt 98 is slidably supported by a sleeve 1.0/1- carried by inner and outer hemi-spherical stampings 106 and 108 embracing a stationary spherical support 110 bold or otherwise secured to the chassis trame 10. The stampings 106 and 108 are held yieldingly against the outside and inside of the support 110 by a spring 112 confined between the inner stamping 108 and diaphragm or stop 114 secured to the end of the sleeve 1041-. The support 56 is extended to form a partial enclosure 116 cooperating with stampings 118 mounted on the control shaft 98 to inclose the universel joint 100. rli"he universal joint is above and substantially in line with the pivot connecting the knuckle 26 to the axle According to the present invention the arm 86 is mounted on inclined splines 117 formed on or carried by the control shaft 98 and is urged along those splines by the spring 118 to compensate for the automatic adjustment of cam 4:0 in its released position as the brelre wears. Spring 118 is confined between the arm 9 6 and a stop 120 secured to the controi shaft 98. Stop 120 is illustrated as also serving as an abutment for a spring 122 it. ing tliestampings 118 yieldingly in eng,4c ment with the part 116 or@ the cam-shalt O b. will be seen that with. the above-e` the other three brakes sothet there is s... f

predetermined applying rele movement of the brake -for any given fue ment of the operating connections fro pedal 48. lt will also be noted that c t i tions to the four breites are not squali/.e that if it should be desirable et provide an initial adjustment et any o/ the brakes slightly diterent from ot messie.

that adjustment will automatically he pteseived as the respective brakes Wear. It Wilt also he noted that if one brake should Wear tester than the others the adjustment Witt 5 compensate for vthe increased Wea-r so that there will be no eiiect onthe operating connections. v White certain illustrative embodiments heve heen described in detail, it is not my intention to limit the scope ot this invention to those particular embodiments, or otherwise than hy the terms of the appended clninis.

hrehe-eppiying device including s cam end shsitt, and a yieidingly-held hearing tot the shaft, the hearing and cam having en intertitting notch end projection allowing predetermined tree movement of the shnft end then shitting the hearino.

i hisle-eppiying device inchiding n com sind shaft, sind e yieldingly-held hearing -ion the shsift, the hearing having e notch eindv com heving a projection in the notch ei:-

L to eiiovv s predetermined iee movet of the shett end then to shift the hesihrsheepptying device comprising, in on, e hrnkeopemting shatt, Ineens to give snhstentieiiy constant headteoveineni-L, en erin on the shaft tot and ineens for shitting the erna. c sngnierly ont the shaft to pieserxve position es the breite-released ne shaft is vanied. he-eppiying device comprising, in ion, hoehe-operating shaft hsv: spiines, ineens :tor predeteiininingg i position ot the shaft to give sohconstent hrake-teiessing moveoed on the shatt tor operetfor shifitinv the arni sions; c to s iitt it sngnieily to pteserve posi 'on as the hteke-reiee'sed oi i o is varied..

-spptjying device comprising, in Uion, hesite-operating shatt, means caeiniining, the engsten position o o give snhstentiaiiy constant hieltemoveto ot, en anni on the for sind spying f,tot shitting,` the the shaft to ptethe heette-ifeveiiedu e-eppiying device coinpiising,

e hesite-operating shan' l avi nes, ineens tot' ptedetecmini position et the to give st constant hraiereieesing in f in sptined on the sh foi ope e spring; tot shin t.; the s to shitt it .angnieriy to preserve position ss the hrehe-'eeleosed ne shet is variedn erinining the engniar position oie' lply the brake, and means controiled hy the weer-measuring moons :tot nutomntcsliy edjusting the erm angnlariy on the shaft esthc Draike Wears, to preserve o constant relessed position oi seid erin sind to predetermine the releasing movement o'f seid hesite-eppiying device.

Si. A vehicie having: e sv-Jiveiied wheei with a hrahe, and s yieidingiy-snppoited chassis pest opposite the vvheei, end comprising, in I combination therewith, htehe-epplying device Sivit/'citing with the Wheet, means etso swiveiing with the Wheei foi" edinsteihly ptedoterniining,1 the teieesed position of seid device es the torche Wests, e shett tnovshiy snpported et its innei1 end on seid chessisiiome end universality connected to seid device et its onteio end nppnoiiiineteiv at the svviveliingo anis ot the Wheei, en etno on seid shei't en ranged to roch the oppiv the breite, end ineens for et ,aticoliy edinsting the sngntnriy on e shett es device is to coinpensete for wenn of the breite, to preserve constnnt teieesed position ot seid erin in ali m htaheepptying ocvice..

9. A vehicie hnvi e hi'ehe, end o yiei pent opposite the i combination these vice stviveiiing vv ahiy supported e' sis freine end nn swiveited Wheei vv'th dingy-supported chsssjis heel, cornpiising, in ""gi, hrnhe-oppiying de vfheei s1 f' l inervn Jetseiy connected to se device its ente ed t svviveitingg exis of the wheei, en erin on seid shett eitenged to :nocif the shn't to eppiy hrahe, end encens i y adjust 7 on the es the Je s 'constant teiessed position to predetermine sei-eosin@ ii t nhe-nppiying sptimes LJphnes to so oevice comprising, ,l she-ft, e p o conse ongein? el d sieste togethei, l he Steeve, device 'a inovet esistiv the shett end sity ivi cousins;

orto wie., respect n, e steeve.

edjnsted positions of ll. A bralre- 1n combination, a sleeve axially inovanA j device comprising, Lre-applying shaft, a on the shaft and arranged to cause .r movement oi the shaft and sleeve together and formed with inclined splines, an firm on said splines ranged to rock the sleeve, a device holding the arm against movei ent axially of the shaft, and means for sh ing the sleeve axiallywith respect to the shaft to move said splines with respect to the arm and cause angular adjustment or the arm on the sleeve. 12. A. brake-applying device comprising, in combination, a brake-applying shaft, a sleeve axially movable on the shaft and arranged to cause angular movement oi? the shaft and sleeve together and :formed with inclined splines, an on said splines arranged to roch the sleeve, a device holding 'the arm movement axially of the shaft, and a spring compressed and conned between said arm and part of the'sleeve and urging the splines axially with respect to the arm.

i3. A bralie comprising, in combination, a drum, friction means Within and expansible against the drum, c device extending into the rum and arranged apply the friction means, means Within the drum to predeterinine the bralereleasing movement of the :friction rneans the applying device, a part outside the drum for operating the applying device, and means for automatically adjusting said with respect to the applying device to prese ve a constant released position of said part in any released position said device.

A. bralre comprisi drum, friction means i against the drum, cwi arranged to apply the within the drum to releasing nicvnient andthe ca e, a part o in combination, a nin and expansible hin the drum and ion means, means eterrnine the brake- Jne `friction ineens de drum :for opns for automatically :espect to the cain ased position of give snoutLA n inoverneirtn preserve released C?? it?. ing, in co ing adapted to limit the rota l1 .ying movement of the shaitt to the torque thereof into thrust to adjustably lposition the bearing with respect to the supnort. IJ?. Brake applying mechanism comprising, in combination, a stationary support, a brake shaft bearingcarried by the support resistingly adjustable thereover, c brake shaft journaled in said bearing, an a L plying cern on the shaft, an operating erin on the shaft, means coupling said shaft bearing and means coupling said the shaft vvhereby the permitted rote piying movement of the cani is dernined, the bearing is automatically ao usted `with respect to the support compensa wear, and the arm is automatically s iarly adjusted with respect to the cam to iaintain a constant released position irr sceseve of the adjusting of the cam for r-veai8. Brake applying mechanism ing, in combination, brake friction nec/ns, a rotatable brake shaft provided cam to apply the friction means and an operating arm to actuate the shaft, said arm fi d cam being relatively automatically angniarly adiustable about the axis of the sh bo compensate for Wear of the friction cans and to maintain duringsaid compensatie i a constant released position of the arm, re bea sleeve keyed to the shaft sn'rally splined to the arm for effecting the described adjustnzientD i9. 'Brake applying mechanism in g, in combination, a rotatabie sh compriseci with a cam7 means predeteri rotatable movement of the cam 

